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          <h1 class="mb-0 p-1 ">GoJS</h1>
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    <!-- The DIV for the Diagram needs an explicit size or else we won't see anything.
       Also add a border to help see the edges. -->
    <div id="myDiagramDiv" style="border: solid 1px black; width:400px; height:400px"></div>
    <p>
      This custom <a>DraggingTool</a> class makes guidelines visible as a Part is dragged around a Diagram and is nearly
      aligned with another Part.
      If a locationObjectName is set, then this aligns <a>Part.locationObject</a>s instead.
      The tool is defined in its own file, as <a href="GuidedDraggingTool.ts">GuidedDraggingTool.ts</a>.
    </p>
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  <script type="module" id="code">
    import * as go from "../release/go-module.js";
    import { GuidedDraggingTool } from './GuidedDraggingTool.js';

    if (window.goSamples) window.goSamples(); // init for these samples -- you don't need to call this
    const $ = go.GraphObject.make; // for conciseness in defining templates

    const myDiagram = $(go.Diagram, 'myDiagramDiv', // create a Diagram for the DIV HTML element
      {
        draggingTool: new GuidedDraggingTool(),
        'draggingTool.horizontalGuidelineColor': 'blue',
        'draggingTool.verticalGuidelineColor': 'blue',
        'draggingTool.centerGuidelineColor': 'green',
        'draggingTool.guidelineWidth': 1,
        'undoManager.isEnabled': true // enable undo & redo
      });

    // define a simple Node template
    myDiagram.nodeTemplate =
      $(go.Node, 'Auto', // the Shape will go around the TextBlock
        $(go.Shape, 'RoundedRectangle', { strokeWidth: 0 },
        // Shape.fill is bound to Node.data.color
        new go.Binding('fill', 'color')), $(go.TextBlock, { margin: 8 }, // some room around the text
        // TextBlock.text is bound to Node.data.key
        new go.Binding('text', 'key')));

    // but use the default Link template, by not setting Diagram.linkTemplate

    // create the model data that will be represented by Nodes and Links
    myDiagram.model = new go.GraphLinksModel([
      { key: 'Alpha', color: 'lightblue' },
      { key: 'Beta', color: 'orange' },
      { key: 'Gamma', color: 'lightgreen' },
      { key: 'Delta', color: 'pink' }
    ], [
      { from: 'Alpha', to: 'Beta' },
      { from: 'Alpha', to: 'Gamma' },
      { from: 'Beta', to: 'Beta' },
      { from: 'Gamma', to: 'Delta' },
      { from: 'Delta', to: 'Alpha' }
    ]);

    window.myDiagram = myDiagram; // Attach to the window for console debugging
  </script>
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